Bore brushes are the workhorse of any cleaning routine — phosphor bronze bristles bite into carbon, lead, and plastic wad residue that patches alone can't shift. The lineup runs from .17 caliber through .50 caliber for rifles and pistols, with 12 GA, 16 GA, 20 GA, and .410 brushes for shotguns plus a 5.56mm chamber brush for AR platforms.
